義妹生活 (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Introduction: Yuta and his classmate Saki become "brother and sister-in-law" after their father's remarriage. While Yuta is a simple man, his younger sister Saki is a flamboyant girl who looks like a gal. Yuta, who has a distaste for women due to his past experiences, is perplexed by the fact that Saki is the complete opposite of him...?

(Translator: DeepL)